Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 296 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/gengenrtl.c b/gcc-4.9/gcc/gengenrtl.c
new file mode 100644
index 000000000..f1f9f1688
--- /dev/null
+++ b/gcc-4.9/gcc/gengenrtl.c
@@ -0,0 +1,296 @@
+/* Generate code to allocate RTL structures.
+   Copyright (C) 1997-2014 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+
+#include "bconfig.h"
+#include "system.h"
+
+struct rtx_definition
+{
+  const char *const enumname, *const name, *const format;
+};
+
+/* rtl.def needs CONST_DOUBLE_FORMAT, but we don't care what
+   CONST_DOUBLE_FORMAT is because we're not going to be generating
+   anything for CONST_DOUBLE anyway.  */
+#define CONST_DOUBLE_FORMAT ""
+
+#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { #ENUM, NAME, FORMAT },
+
+static const struct rtx_definition defs[] =
+{
+#include "rtl.def"		/* rtl expressions are documented here */
+};
+#define NUM_RTX_CODE ARRAY_SIZE (defs)
+
+static const char *formats[NUM_RTX_CODE];
+
+/* Decode a format letter into a C type string.  */
+
+static const char *
+type_from_format (int c)
+{
+  switch (c)
+    {
+    case 'i':
+      return "int ";
+
+    case 'w':
+      return "HOST_WIDE_INT ";
+
+    case 's':
+      return "const char *";
+
+    case 'e':  case 'u':
+      return "rtx ";
+
+    case 'E':
+      return "rtvec ";
+    case 't':
+      return "tree ";
+    case 'B':
+      return "basic_block ";
+    default:
+      gcc_unreachable ();
+    }
+}
+
+/* Decode a format letter into the proper accessor function.  */
+
+static const char *
+accessor_from_format (int c)
+{
+  switch (c)
+    {
+    case 'i':
+      return "XINT";
+
+    case 'w':
+      return "XWINT";
+
+    case 's':
+      return "XSTR";
+
+    case 'e':  case 'u':
+      return "XEXP";
+
+    case 'E':
+      return "XVEC";
+
+    case 't':
+      return "XTREE";
+
+    case 'B':
+      return "XBBDEF";
+
+    default:
+      gcc_unreachable ();
+    }
+}
+
+/* Return nonzero if we should ignore FMT, an RTL format, when making
+   the list of formats we write routines to create.  */
+
+static int
+special_format (const char *fmt)
+{
+  return (strchr (fmt, '*') != 0
+	  || strchr (fmt, 'V') != 0
+	  || strchr (fmt, 'S') != 0
+	  || strchr (fmt, 'n') != 0);
+}
+
+/* Return nonzero if the RTL code given by index IDX is one that we should
+   generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
+   is a wrapper in emit-rtl.c).  */
+
+static int
+special_rtx (int idx)
+{
+  return (strcmp (defs[idx].enumname, "CONST_INT") == 0
+	  || strcmp (defs[idx].enumname, "REG") == 0
+	  || strcmp (defs[idx].enumname, "SUBREG") == 0
+	  || strcmp (defs[idx].enumname, "MEM") == 0
+	  || strcmp (defs[idx].enumname, "PC") == 0
+	  || strcmp (defs[idx].enumname, "CC0") == 0
+	  || strcmp (defs[idx].enumname, "RETURN") == 0
+	  || strcmp (defs[idx].enumname, "SIMPLE_RETURN") == 0
+	  || strcmp (defs[idx].enumname, "CONST_VECTOR") == 0);
+}
+
+/* Return nonzero if the RTL code given by index IDX is one that we should
+   generate no macro for at all (because gen_rtx_FOO is never used or
+   cannot have the obvious interface).  */
+
+static int
+excluded_rtx (int idx)
+{
+  return ((strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0)
+	  || (strcmp (defs[idx].enumname, "CONST_FIXED") == 0));
+}
+
+/* Place a list of all format specifiers we use into the array FORMAT.  */
+
+static void
+find_formats (void)
+{
+  unsigned int i;
+
+  for (i = 0; i < NUM_RTX_CODE; i++)
+    {
+      const char **f;
+
+      if (special_format (defs[i].format))
+	continue;
+
+      for (f = formats; *f; f++)
+	if (! strcmp (*f, defs[i].format))
+	  break;
+
+      if (*f == 0)
+	*f = defs[i].format;
+    }
+}
+
+
+/* Generate macros to generate RTL of code IDX using the functions we
+   write.  */
+
+static void
+genmacro (int idx)
+{
+  const char *p;
+  int i;
+
+  /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
+     gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE.  */
+
+  if (excluded_rtx (idx))
+    /* Don't define a macro for this code.  */
+    return;
+
+  printf ("#define gen_rtx_%s%s(MODE",
+	   special_rtx (idx) ? "raw_" : "", defs[idx].enumname);
+
+  for (p = defs[idx].format, i = 0; *p != 0; p++)
+    if (*p != '0')
+      printf (", ARG%d", i++);
+
+  printf (") \\\n  gen_rtx_fmt_%s (%s, (MODE)",
+	  defs[idx].format, defs[idx].enumname);
+
+  for (p = defs[idx].format, i = 0; *p != 0; p++)
+    if (*p != '0')
+      printf (", (ARG%d)", i++);
+
+  puts (")");
+}
+
+/* Generate the code for the function to generate RTL whose
+   format is FORMAT.  */
+
+static void
+gendef (const char *format)
+{
+  const char *p;
+  int i, j;
+
+  /* Start by writing the definition of the function name and the types
+     of the arguments.  */
+
+  printf ("static inline rtx\ngen_rtx_fmt_%s_stat (RTX_CODE code, enum machine_mode mode", format);
+  for (p = format, i = 0; *p != 0; p++)
+    if (*p != '0')
+      printf (",\n\t%sarg%d", type_from_format (*p), i++);
+
+  puts (" MEM_STAT_DECL)");
+
+  /* Now write out the body of the function itself, which allocates
+     the memory and initializes it.  */
+  puts ("{");
+  puts ("  rtx rt;");
+  puts ("  rt = rtx_alloc_stat (code PASS_MEM_STAT);\n");
+
+  puts ("  PUT_MODE (rt, mode);");
+
+  for (p = format, i = j = 0; *p ; ++p, ++i)
+    if (*p != '0')
+      printf ("  %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
+    else
+      printf ("  X0EXP (rt, %d) = NULL_RTX;\n", i);
+
+  puts ("\n  return rt;\n}\n");
+  printf ("#define gen_rtx_fmt_%s(c, m", format);
+  for (p = format, i = 0; *p != 0; p++)
+    if (*p != '0')
+      printf (", p%i",i++);
+  printf (")\\\n        gen_rtx_fmt_%s_stat (c, m", format);
+  for (p = format, i = 0; *p != 0; p++)
+    if (*p != '0')
+      printf (", p%i",i++);
+  printf (" MEM_STAT_INFO)\n\n");
+}
+
+/* Generate the documentation header for files we write.  */
+
+static void
+genlegend (void)
+{
+  puts ("/* Generated automatically by gengenrtl from rtl.def.  */\n");
+}
+
+/* Generate the text of the header file we make, genrtl.h.  */
+
+static void
+genheader (void)
+{
+  unsigned int i;
+  const char **fmt;
+
+  puts ("#ifndef GCC_GENRTL_H");
+  puts ("#define GCC_GENRTL_H\n");
+  puts ("#include \"statistics.h\"\n");
+
+  for (fmt = formats; *fmt; ++fmt)
+    gendef (*fmt);
+
+  putchar ('\n');
+
+  for (i = 0; i < NUM_RTX_CODE; i++)
+    if (! special_format (defs[i].format))
+      genmacro (i);
+
+  puts ("\n#endif /* GCC_GENRTL_H */");
+}
+
+/* This is the main program.  */
+
+int
+main (void)
+{
+  find_formats ();
+  genlegend ();
+
+  genheader ();
+
+  if (ferror (stdout) || fflush (stdout) || fclose (stdout))
+    return FATAL_EXIT_CODE;
+
+  return SUCCESS_EXIT_CODE;
+}